A new form of graffiti? hope so cool:
LED throwies 2 - Trips will love the track on this
http://graffitiresearchlab.com/?page_id=17#video
Night writer
http://graffitiresearchlab.com/?page_id=19
edit: A very nice projection video, check it
http://graffitiresearchlab.com/?page_id=16#video
other vids on side of page. I think it looks kinda cool, the colours are great, seems cheap and is more interesting then an ugly tag....
[img]http://img250.imageshack.us/img250/1433/1034849624251b4f6028eh.jpg[/img]
*goes to local hardware store